Disadvantages of trade unions

they sometimes encourage inefficiency by forcing employers to employ or retain unnecessarily large numbers of employees.

through force, trade unions can coerce the workers to support the "unions" opinion by joining strikes which affect production.

a powerful union of workers in a particular industry can through unreasonable demand for wages not only secure higher wages but may induce workers in other industries to make similar demands though unreasonable.

through political leanings, the workers can be misguided to achieve the trade unionists political motives.